Surface-Passivated SBA-15-Supported Gold Nanoparticles: Highly Improved Catalytic Activity and Selectivity toward Hydrophobic Substrates
Article first published online: 12 MAR 2013
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Chemistry – An Asian Journal
Volume 8, Issue 5, pages 934–938, May 2013
How to Cite
Gao, J., Zhang, X., Yang, Y., Ke, J., Li, X., Zhang, Y., Tan, F., Chen, J. and Quan, X. (2013), Surface-Passivated SBA-15-Supported Gold Nanoparticles: Highly Improved Catalytic Activity and Selectivity toward Hydrophobic Substrates. Chem. Asian J., 8: 934–938. doi: 10.1002/asia.201300088
- Issue published online: 23 APR 2013
- Article first published online: 12 MAR 2013
- Manuscript Received: 23 JAN 2013
- National Natural Science Foundation of China. Grant Number: 21107009
- Fundamental Research Funds for the Central Universities of China. Grant Number: DUT11RC(3)12
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- mesoporous materials;
- surface chemistry
Silanol groups on a silica surface affect the activity of immobilized catalysts because they can influence the hydrophilicity/hydrophobicity, matter transfer, or even transition state in a catalytic reaction. Previously, these silanol groups have usually been passivated by using surface-passivation reagents, such as alkoxysilanes, bis-silylamine reagents, chlorosilanes, etc., and surface passivation has typically been found in mesoporous-silicas-supported molecular catalysts and heteroatomic catalysts. However, this property has rarely been reported in mesoporous-silicas-supported metal-nanoparticle catalysts. Herein, we prepared an almost-superhydrophobic SBA-15-supported gold-nanoparticle catalyst by using surface passivation, in which the catalytic activity increased more than 14 times for the reduction of nitrobenzene compared with non-passivated SBA-15. In addition, this catalyst can selectively catalyze hydrophobic molecules under our experimental conditions, owing to its high (almost superhydrophobic) hydrophobic properties.